[INFO] fetching crate wavefront 0.2.2...
[INFO] documenting wavefront-0.2.2 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate wavefront 0.2.2 into /workspace/builds/worker-29/source
[INFO] validating manifest of crates.io crate wavefront 0.2.2 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wavefront 0.2.2
[INFO] finished tweaking crates.io crate wavefront 0.2.2
[INFO] tweaked toml for crates.io crate wavefront 0.2.2 written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efce97508a3c94afffe8e8156e051b2c8596b4fd433476cbfec763ff607a7e6a
[INFO] running `Command { std: "docker" "start" "-a" "efce97508a3c94afffe8e8156e051b2c8596b4fd433476cbfec763ff607a7e6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efce97508a3c94afffe8e8156e051b2c8596b4fd433476cbfec763ff607a7e6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efce97508a3c94afffe8e8156e051b2c8596b4fd433476cbfec763ff607a7e6a", kill_on_drop: false }`
[INFO] [stdout] efce97508a3c94afffe8e8156e051b2c8596b4fd433476cbfec763ff607a7e6a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52436099176a356fdf2c4a9578c4c8b71cc47b9df770430cff48b981a3437243
[INFO] running `Command { std: "docker" "start" "-a" "52436099176a356fdf2c4a9578c4c8b71cc47b9df770430cff48b981a3437243", kill_on_drop: false }`
[INFO] [stderr]     Checking ahash v0.4.7
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]  Documenting wavefront v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![feature(iter_map_while)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `wavefront`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name wavefront src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="std"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=39e114405e317498 -L dependency=/opt/rustwide/target/debug/deps --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-92224d0d2b3385ef.rmeta --cap-lints=warn --crate-version 0.2.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "52436099176a356fdf2c4a9578c4c8b71cc47b9df770430cff48b981a3437243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52436099176a356fdf2c4a9578c4c8b71cc47b9df770430cff48b981a3437243", kill_on_drop: false }`
[INFO] [stdout] 52436099176a356fdf2c4a9578c4c8b71cc47b9df770430cff48b981a3437243